## Abstract

Atom photoionization by the superposition of a fundamental field and its second harmonic is considered. The finite analytical expressions for the photoionization probability are obtained using the adiabatic approximation. They demonstrate that the photoelectron angular distribution has a polar symmetry when the electrical field strength has a maximal polar asymmetry and the distribution is asymmetrical when the field is symmetrical. A strict proof of the polar symmetry of the photoionization probability in the case of the electrical field with maximal asymmetry is deduced using the Keldysh-Faisal-Reiss theories. The obtained results are in agreement with the experimental data available.

Original language | English |
---|---|

Pages (from-to) | 632-640 |

Number of pages | 9 |

Journal | Physical Review A |

Volume | 51 |

Issue number | 1 |

DOIs | |

State | Published - 1995 |

Externally published | Yes |